#!/usr/bin/bash

# This hook doesn't do anything except echo the status lines that the old mdadm hook did.
# Started md1 with 2 of 2 devices [UU]

# First made for Arch Linux AUR package mdadm-git

run_hook() {
  # bash -c 'source mdadm_udev_hook; run_hook'
  # http://unix.stackexchange.com/questions/28636/how-to-check-mdadm-raids-while-running
  # awk puts the 2 lines together. sed outputs the formatted text
  awk '/^md/ {printf "%s: ", $1}; /blocks/ {print $0 }' < '/proc/mdstat' | sed -ne 's;^\(.\+\):.*\[\([0-9]\+\)\/\([0-9]\+\)\].*\(\[[^]]*\]\).*$;Started \1 with \2 of \3 devices \4;p' | sort
  #sleep 1
  if ! /usr/bin/mdadm -D --scan >/dev/null; then
    echo 'A RAID array may be damaged. Review /proc/mdstat and fix soon!'
    sleep 5
  fi
}